Nissan Pathfinder Transfer Case Assembly 33100-3KA0B

This is the complete transfer case assembly, also called the power transfer unit (PTU), that bolts to the side of the CVT on the 3.5L V6 Nissan and Infiniti AWD crossovers. It takes power off the transaxle differential and sends it back to the rear driveshaft. It replaces Nissan part numbers 33100-3KA0B and 33100-3KA0C, and aftermarket 412-59276.

Fitment: 2013-2019 Nissan Pathfinder, 2015-2020 Nissan Murano, 2013 Infiniti JX35 and 2014-2019 Infiniti QX60, all with the 3.5L V6 and CVT. Confirm your original part number against the tag on the old unit before ordering.

These units fail the same way over and over: the small internal fluid volume runs hot and breaks down, the hypoid gears wear, and you get a whine or grinding that changes with speed, a burnt gear oil smell, or a leak at the axle or output seals. Once the gears are chewed up, replacing the whole assembly is faster and cheaper than sourcing bearings and a gear set.

On the bench: drain and pull the right front axle, unbolt the rear driveshaft from the PTU flange, support the unit and remove the mounting bolts to the transaxle. Transfer the bracket if needed, install new seals at the transaxle interface, bolt the new unit in, and fill it with the correct gear oil before the first drive. Changing the PTU oil on a regular interval afterward is the best way to keep the new one alive.